James Corden, who hosts the show said: “We made a thing on the show that he’s the only member of the band without a tattoo. I said to him we’ve got this idea of putting a tattoo of my face on your body. Niall went, ‘You should put it on my ar*e’.

"We tattooed it on to his left buttock — it took him three weeks to get rid of it.

“He sent me updates every week, with a photo of my fading face on his a*se saying, ‘It’s still not gone yet’.”